all doc.txt content moved to mrlib.tex
svn: r1440
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Matthew Flatt
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_name-message.ss_
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The _name-message%_ class is derived from canvas%. It
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overrides the on-paint and on-event methods to draw the name
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of a file and handle clicks to popup a menu for choosing a
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directory.
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> (send a-name-message set-message file-name? msg)
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file-name? : boolean
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msg : string
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If file-name? is #t, msg is treated like a pathname and
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clicks on the name message objects popup a menu that opens a
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get-file dialog.
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If file-name is #f, msg is treated as a regular
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string. Clicking on the name message pops up a dialog saying
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that there is no file name until the file is saved.
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> (send a-name-message on-choose-directory dir)
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dir : string
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This method is called when one of the popup menu items is
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chosen. The argument is a string representing the specified
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directory.
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============================================================
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> (calc-button-min-sizes dc string)
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Calculates the minimum width and height of a button label
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(when drawn with draw-button-label). Returns two values: the
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width and height.
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============================================================
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> (draw-frame-button-label dc label width height inverted)
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Draws a button label like the one for the (define ...) and
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filename buttons in the top-left corner of the DrScheme
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frame. Use this function to draw similar buttons. The basic
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idea is to create a canvas object whose on-paint method is
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overridden to call this function. The dc should be canvas's
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dc object, the label should be the string to display on the
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button. The width and height arguments should be the width
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and height of the button and inverted? should be #t when the
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button is being depressed.
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See calc-button-min-sizes for help calculating the min sizes
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of the button.
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[][][][][][][][][][][][][][][][][][][][][][][][][][][][][][]
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_plot.ss_
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[][][][][][][][][][][][][][][][][][][][][][][][][][][][][][]
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plot.ss provides a simple tool for plotting data values to a
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device context.
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Two structures are provided:
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===========================================================
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> (struct data-set ((points (listof (is-a?/c point%)))
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(connected? any?)
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(pen (is-a?/c pen%))
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(min-x number?)
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(max-x number?)
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(min-y number?)
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(max-y number?)))
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points: the list of data values.
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connected: determines whether the points are connected by a line or not.
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pen: the pen% to draw the points/lines with.
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min-x, max-x, min-y, max-y: indicate the window coordinates that the
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data should be drawn in.
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===========================================================
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> (struct plot-setup ((axis-label-font (is-a?/c font%))
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(axis-number-font (is-a?/c font%))
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(axis-pen (is-a?/c pen%))
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(grid? any?)
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(grid-pen (is-a?/c pen%))
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(x-axis-marking (listof number?))
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(y-axis-marking (listof number?))
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(x-axis-label string?)
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(y-axis-label string?)))
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axis-label-font: the font% the axis-labels is drawn with.
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axis-number-font: the font% the numbering on the axes is
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drawn with.
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axis-pen: the pen% the axis is drawn with.
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grid?: whether a grid should be drawn in at each axis marking.
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grid-pen: the pen% to draw the grid with.
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x-axis-marking: where marks should be placed on the x-axis.
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y-axis-marking: where marks should be placed on the y-axis.
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x-axis-label-string: the x-axis label.
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y-axis-label-string: the y-axis label.
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===========================================================
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One function is provided:
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===========================================================
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> (plot (is-a?/c dc<%>) (listof data-set?) plot-setup?)
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Draws the data-sets on the dc<%> configured by the setup.
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Uses window coordinates that will accommodate all of the
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data sets.
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[][][][][][][][][][][][][][][][][][][][][][][][][][][][][][]
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_include-bitmap.ss_
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[][][][][][][][][][][][][][][][][][][][][][][][][][][][][][]
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The include-bitmap.ss library provides a `include-bitmap form that
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takes a filename containing a bitmap and "inlines" the bitmap into the
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program. The advantage of "inlining" the bitmap is that a stand-alone
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executable can be created that contains the bitmap and does not refer
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to the original image file.
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> (include-bitmap file-spec) SYNTAX
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> (include-bitmap file-spec type-expr) SYNTAX
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The `file-spec' is the same as for MzLib's `include': a path string, a
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`build-path' form, or a `lib' form. The `type-expr' should produce
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'unknown, 'unknown/mask, etc., and the default is 'unknown/mask.
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> (include-bitmap/relative-to source file-spec) SYNTAX
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> (include-bitmap/relative-to source file-spec type-expr) SYNTAX
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Analogous to `include-at/relative-to', though only a source is needed
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(no context).
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